EP0396977A3 - Process for the preparation of polyisocyanates - Google Patents

Process for the preparation of polyisocyanates Download PDF

Info

Publication number
EP0396977A3
EP0396977A3 EP19900108013 EP90108013A EP0396977A3 EP 0396977 A3 EP0396977 A3 EP 0396977A3 EP 19900108013 EP19900108013 EP 19900108013 EP 90108013 A EP90108013 A EP 90108013A EP 0396977 A3 EP0396977 A3 EP 0396977A3
Authority
EP
European Patent Office
Prior art keywords
polyisocyanates
preparation
acid esters
carbamic acid
relates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19900108013
Other languages
German (de)
French (fr)
Other versions
EP0396977B1 (en
EP0396977A2 (en
Inventor
Günter Dr. Hammen
Hartmut Dr. Knöfel
Wolfgang Dr. Friederichs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of EP0396977A2 publication Critical patent/EP0396977A2/en
Publication of EP0396977A3 publication Critical patent/EP0396977A3/en
Application granted granted Critical
Publication of EP0396977B1 publication Critical patent/EP0396977B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C263/00—Preparation of derivatives of isocyanic acid
    • C07C263/18—Separation; Purification; Stabilisation; Use of additives
    • C07C263/20—Separation; Purification
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C263/00—Preparation of derivatives of isocyanic acid
    • C07C263/04—Preparation of derivatives of isocyanic acid from or via carbamates or carbamoyl halides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Die vorliegende Erfindung betrifft ein Verfahren zur Her­ stellung von organischen Polyisocyanaten durch thermische Spaltung der ihnen zugrundeliegenden Carbaminsäureester. The present invention relates to a method for manufacturing provision of organic polyisocyanates by thermal Cleavage of the carbamic acid esters on which they are based.

EP90108013A 1989-05-10 1990-04-27 Process for the preparation of polyisocyanates Expired - Lifetime EP0396977B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3915181A DE3915181A1 (en) 1989-05-10 1989-05-10 METHOD FOR PRODUCING POLYISOCYANATES
DE3915181 1989-05-10

Publications (3)

Publication Number Publication Date
EP0396977A2 EP0396977A2 (en) 1990-11-14
EP0396977A3 true EP0396977A3 (en) 1992-01-22
EP0396977B1 EP0396977B1 (en) 1994-06-15

Family

ID=6380340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90108013A Expired - Lifetime EP0396977B1 (en) 1989-05-10 1990-04-27 Process for the preparation of polyisocyanates

Country Status (7)

Country Link
US (1) US5043471A (en)
EP (1) EP0396977B1 (en)
JP (1) JPH02295959A (en)
BR (1) BR9002162A (en)
CA (1) CA2015222A1 (en)
DE (2) DE3915181A1 (en)
ES (1) ES2055213T3 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04221356A (en) * 1990-12-20 1992-08-11 Mitsubishi Gas Chem Co Inc Production of xylylene diisocyanate
DE4200236A1 (en) * 1992-01-08 1993-07-15 Bayer Ag METHOD FOR ISOLATING POLYISOCYANATE ISOMERS FROM POLYISOCYANATE MIXTURES
ES2166922T3 (en) * 1996-03-15 2002-05-01 Bayer Ag USE OF SOLVENTS OR MIXTURES OF HIGH-POINT SOLUTIONS OF MEASUREMENT AS A HEAT EXCHANGING MEDIUM FOR THE THERMAL DISSOCIATION OF CARBAMIC ACID ESTERS.
EP1259480B1 (en) 2000-02-29 2005-10-05 Huntsman International Llc Process for the preparation of organic polyisocyanates
CN101652344B (en) * 2007-03-30 2014-06-04 旭化成化学株式会社 Method for production of isocyanate using composition comprising carbamic acid ester and aromatic hydroxy compound, and composition for transport or storage of carbamic acid ester
EP2626345B1 (en) 2010-10-04 2019-01-16 Asahi Kasei Kabushiki Kaisha Separation method and method for producing isocyanate
CN103804236B (en) * 2012-11-13 2016-06-22 中国科学院过程工程研究所 A kind of pressurized pyrolysis prepares the Apparatus and method for of isocyanates
JP2019199421A (en) * 2018-05-15 2019-11-21 旭化成株式会社 Method for producing isocyanate

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919280A (en) * 1974-07-05 1975-11-11 Atlantic Richfield Co Recovery of solvents employed in the production of isocyanates from esters of carbamic acids
EP0061013A1 (en) * 1981-03-10 1982-09-29 Bayer Ag Process for the preparation of polyisocyanates
EP0092738A1 (en) * 1982-04-27 1983-11-02 Bayer Ag Process for the continuous thermal decomposition of carbamic-acid esters
EP0175117A2 (en) * 1984-08-16 1986-03-26 Bayer Ag Process for recovering pure diisocyanates

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409712A (en) * 1944-02-03 1946-10-22 Du Pont Chemical process and products
US3962302A (en) * 1974-03-08 1976-06-08 Atlantic Richfield Company Production of isocyanates from esters of carbamic acids (urethanes)
US3919278A (en) * 1974-06-13 1975-11-11 Atlantic Richfield Co Production of isocyanates from lower alkyl esters of mononuclear aromatic carbamic acids
US3919279A (en) * 1974-06-26 1975-11-11 Atlantic Richfield Co Catalytic production of isocyanates from esters of carbamic acids
JPS5219624A (en) * 1975-08-07 1977-02-15 Mitsui Toatsu Chem Inc Process for preparation of isocyanates
DE2942543A1 (en) * 1979-10-20 1981-05-07 Basf Ag, 6700 Ludwigshafen METHOD FOR PRODUCING ARYLISOCYANATES BY THERMAL CLEAVING OF ARYLURETHANES
JPS60231640A (en) * 1984-05-02 1985-11-18 Asahi Chem Ind Co Ltd Continuous production of isocyanate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919280A (en) * 1974-07-05 1975-11-11 Atlantic Richfield Co Recovery of solvents employed in the production of isocyanates from esters of carbamic acids
EP0061013A1 (en) * 1981-03-10 1982-09-29 Bayer Ag Process for the preparation of polyisocyanates
EP0092738A1 (en) * 1982-04-27 1983-11-02 Bayer Ag Process for the continuous thermal decomposition of carbamic-acid esters
EP0175117A2 (en) * 1984-08-16 1986-03-26 Bayer Ag Process for recovering pure diisocyanates

Also Published As

Publication number Publication date
DE3915181A1 (en) 1990-11-15
JPH02295959A (en) 1990-12-06
EP0396977B1 (en) 1994-06-15
CA2015222A1 (en) 1990-11-10
EP0396977A2 (en) 1990-11-14
DE59006103D1 (en) 1994-07-21
ES2055213T3 (en) 1994-08-16
US5043471A (en) 1991-08-27
BR9002162A (en) 1991-08-13

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